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The radiation at right angles is zero means ________

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The radiation at right angles is zero means ________

(a) l = ʎ

(b) l = ^ʎ⁄4

(c) l = 2 ʎ

(d) l = ^ʎ⁄2

I have been asked this question during an interview.

I'm obligated to ask this question of AM Wave Representation topic in division Amplitude Modulation of Analog Communications

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Right option is (a) l = ʎ

Easiest explanation: Antenna is used for converting electromagnetic radiation into electric currents or vice-versa. If the length of antenna is equal to the whole wavelength then the radiation at right angles is zero.

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